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/* $NetBSD: pmap.h,v 1.17 1996/07/20 17:58:22 ragge Exp $ */
/*
* Copyright (c) 1987 Carnegie-Mellon University
* Copyright (c) 1991 Regents of the University of California.
* All rights reserved.
*
* Changed for the VAX port. /IC
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)pmap.h 7.6 (Berkeley) 5/10/91
*/
#ifndef PMAP_H
#define PMAP_H
#include <machine/mtpr.h>
#define VAX_PAGE_SIZE NBPG
#define VAX_SEG_SIZE NBSEG
/*
* Pmap structure
*
* p0br == PR_P0BR in user struct, p0br is also == SBR in pmap_kernel()
* p1br is the same for stack space, stack is base of alloced pte mem
*/
typedef struct pmap {
vm_offset_t pm_stack; /* Base of alloced p1 pte space */
struct pcb *pm_pcb; /* Pointer to PCB for this pmap */
int ref_count; /* reference count */
struct pmap_statistics stats; /* statistics */
simple_lock_data_t lock; /* lock on pmap */
} *pmap_t;
/*
* For each vm_page_t, there is a list of all currently valid virtual
* mappings of that page. An entry is a pv_entry_t, the list is pv_table.
*/
typedef struct pv_entry {
struct pv_entry *pv_next; /* next pv_entry */
struct pmap *pv_pmap;/* if not NULL, pmap where mapping lies */
vm_offset_t pv_va; /* virtual address for mapping */
int pv_flags; /* flags */
} *pv_entry_t;
#define PV_REF 0x00000001 /* Simulated phys ref bit */
#define PHYS_TO_PV(phys_page) (&pv_table[((phys_page)>>PAGE_SHIFT)])
/* ROUND_PAGE used before vm system is initialized */
#define ROUND_PAGE(x) (((uint)(x) + PAGE_SIZE-1)& ~(PAGE_SIZE - 1))
#define TRUNC_PAGE(x) ((uint)(x) & ~(PAGE_SIZE - 1))
/* Mapping macros used when allocating SPT */
#define MAPVIRT(ptr, count) \
(vm_offset_t)ptr = virtual_avail; \
virtual_avail += (count) * NBPG;
#define MAPPHYS(ptr, count, perm) \
pmap_map(virtual_avail, avail_start, avail_start + \
(count) * NBPG, perm); \
(vm_offset_t)ptr = virtual_avail; \
virtual_avail += (count) * NBPG; \
avail_start += (count) * NBPG;
#ifdef _KERNEL
#define pa_index(pa) atop(pa)
#define pa_to_pvh(pa) (&pv_table[atop(pa)])
extern struct pmap kernel_pmap_store;
#define pmap_kernel() (&kernel_pmap_store)
#endif /* _KERNEL */
/* Routines that are best to define as macros */
#define pmap_copy(a,b,c,d,e) /* Dont do anything */
#define pmap_update() mtpr(0,PR_TBIA) /* Update buffes */
#define pmap_pageable(a,b,c,d) /* Dont do anything */
#define pmap_collect(pmap) /* No need so far */
#define pmap_reference(pmap) if(pmap) (pmap)->ref_count++
#define pmap_pinit(pmap) (pmap)->ref_count=1;
#define pmap_phys_address(phys) ((u_int)(phys)<<PAGE_SHIFT)
/* Prototypes */
void pmap_bootstrap __P((void));
void pmap_expandp0 __P((struct pmap *, int));
void pmap_expandp1 __P((struct pmap *));
#endif PMAP_H
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